Alright, let's work through 3185 times 6330 step by step
3185 × 6330 = 6330 × (3185)
+ 6330 × 5 producing 31650
+ 6330 × 80 what gives us 506400
+ 6330 × 100 which equals 633000
+ 6330 × 3000 that equals 18990000

= 20161050
